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Precipitation patterns have also fluctuated, with May 31, 2013 recording the highest precipitation in the past 15 years at 8.5 mm, all of which came from rainfall. Interestingly, seven years out of the last 15 years had no measurable precipitation on this date.
Wind speeds have varied as well, with the strongest gust on May 31 reaching 38 mph (2013) and the highest sustained wind speed recorded at 12 mph (2017).
These historical trends suggest that the weather on May 31 in Union has been quite unpredictable over the years.
Historical May 31 Weather in Union (Last 15 Years)
| Year | High Temp (°F) | Low Temp (°F) | Precipitation (mm) | Rain (mm) | Snowfall (mm) | Strongest Wind Gust (mph) | Max Wind Speed (mph) |
|---|---|---|---|---|---|---|---|
| 2010 | 82°F | 68°F | 1 mm | 1 mm | 0 mm | 22 mph | 9 mph |
| 2011 | 87°F | 70°F | 0.3 mm | 0.3 mm | 0 mm | 22 mph | 8 mph |
| 2012 | 79°F | 57°F | 5.6 mm | 5.6 mm | 0 mm | 19 mph | 7 mph |
| 2013 | 79°F | 69°F | 8.5 mm | 8.5 mm | 0 mm | 38 mph | 12 mph |
| 2014 | 82°F | 61°F | 0 mm | 0 mm | 0 mm | 20 mph | 8 mph |
| 2015 | 70°F | 58°F | 0.6 mm | 0.6 mm | 0 mm | 25 mph | 10 mph |
| 2016 | 83°F | 64°F | 0 mm | 0 mm | 0 mm | 11 mph | 4 mph |
| 2017 | 77°F | 59°F | 1 mm | 1 mm | 0 mm | 27 mph | 12 mph |
| 2018 | 82°F | 68°F | 1.3 mm | 1.3 mm | 0 mm | 34 mph | 12 mph |
| 2019 | 73°F | 62°F | 3.3 mm | 3.3 mm | 0 mm | 18 mph | 6 mph |
| 2020 | 69°F | 52°F | 0 mm | 0 mm | 0 mm | 20 mph | 9 mph |
| 2021 | 73°F | 48°F | 0 mm | 0 mm | 0 mm | 15 mph | 6 mph |
| 2022 | 87°F | 68°F | 0 mm | 0 mm | 0 mm | 21 mph | 9 mph |
| 2023 | 88°F | 64°F | 0 mm | 0 mm | 0 mm | 18 mph | 8 mph |
| 2024 | 74°F | 52°F | 0 mm | 0 mm | 0 mm | 19 mph | 8 mph |
